/Engine/Plugins/Media/PixelStreaming/Source/PixelStreaming/Public/PixelStreamingInputComponent.h
Helper function to add a string field to a JSON descriptor. This produces a new descriptor which may then be chained to add further string fields.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintPure, Category="PixelStreaming Input") void AddJsonStringValue ( const [FString](API\Runtime\Core\Containers\FString) & Descriptor, [FString](API\Runtime\Core\Containers\FString) FieldName, [FString](API\Runtime\Core\Containers\FString) StringValue, [FString](API\Runtime\Core\Containers\FString) & NewDescriptor, bool & Success )